Expansion shield



Patented Aug. 16, 1927.

UNITED "STATES 1,639,223 PATENT OFFICE.

JOSEPH K. FISHER, OF SANTA MONICA, CALIFORNIA, ASSIGNOR TO J. EDWARD OGDEN,

OF MOUNTAINVILLE, NEW YORK.

EXPANSION SHIELD.

Application filed February 6, 1922. Serial No. 534,293.

This invention relatesto expansion shields 1nd particularly to sheet metal shields.

One of the objects of the invention is to provide a device of the character described which will effectively secure or hold a bolt or screw in material such as wood, stone,brick or cementitious material with which the threaded element cannot directly obtain a secure hold. I

Another object of the invention is to pro-- vide a simple construction of expansion shield that may beeconomically manufactured. v

Another objectof the invention is to provide an expansion shield having means for eflectively engaging the wall of an opening in which the shield is placed, this means also serving to resist the withdawal of the shield and to retain it securely in place.' 7

Further objects of the invention will appear from the following description taken in connection with the drawings which form a part of this application and in which Fig. 1 is an elevation, partly in section, of an expansion shield constructed in accordance with theinvention.

Fig. 2 is an elevational view taken at right angles to Fig. 1.

Fig. 3 is an end elevation of the inner end of the shield shown in Fig. 1.

Fig. 4; is, an end elevation of the other end 51 the shield shown in Fig. 1.

Fig. 5 is a plan view ofthe blank from which the sections of the shield shown in Figs. 1-4 may be made.

. Figs. 6 and 6 are elevations of modified forms of stiffening ribs.

Fig. 7 is an end elevation of the inner end of another form of shield constructed in accordance with the invention.

Fig. 8 is an end elevation of the opposite end of the shield shown in Fig. 7. i

Fig. 9 is a p'lan view of a blank from 1 which the shield shown Figs. 7 and 8 may be constructed.

Fig. 10 is an end elevation of the inner end of another'form of shield constructed in accordance with the invention.

Fig. 11 is an end elevation of the opposite end of the shield shown in Fig.10.

Fig. 12 is a plan view of the blank from which the shield shown in Figs. 10 and 11 may be formed.

Figs. 13 and 1 1 are respectively a plan view of a blank and an end elevation of the inner end of a shield formed'therefrom and constructed in accordance with the invention.

Fig. is an elevation of a portion of the shield shown in Figs. 13 and 14 and showing the corrugated ribs.

Fig.16 is a view similar to Fig. 15 but shkpwing another form of the corrugated r1 s.

Fig. 17 is a view similar to Figs. 15 and 16 but showing another form of corrugations or bends in the ribs.

Fig. 18 is an end elevation of the inner end ofanother form of shield constructed in accordance with the invention.

Fig. 19 is a sectional elevation of a part of the shield shown in Fig. 18 and taken substantially in line 1919 of Fig. 18.

Figs. 20, 21 and 22 are respectively a side elevation and end elevations of the two ends of another form of shield constructed in accordance with the invention.

Fig. 23 is a plan view of a blank from which the shield shown in Figs. -22 may be formed.

Fig. 24 is a plan view of a blank from which another form of expansion shield em- .bodying'the lnvention may beformed.

Fig. 25 is an elevation of a portionof still another expansion shield constructed in accordance with'the invention.

Fig. 26 is a plan view of, a portion of a blank from which the shield shown in Fig. 25 may be made. v

The invention by means of which the foregoing objects are attained consists briefly of a sheet metal expansion shield comprising a v tubular member having expansible elements and having transversely corrugated or bent, longitudinally extending project-ions or ribs. In certain of the embodiments of the invention shown in the drawings, the tubular member has a tapered bore and ribs are provided on the outer tapered portion of the shield and inc rease in width as the section of the bore decreases. These ribs are trans. versely bent or corrugated. In another embodiment the ribs extend inwardly instead 'of outwardly.

Like characters of reference designate cor responding parts throughout the several views of the drawings.

In Figs. 1-5 inclusive an expansion shield is illustrated comprising a pair of expansible elements 20 and 21 secured together by a ring 22 or any other suitable securing wardly to form the longitudinal ribs which be stifiened by lateral bends of any desired shape. Moreover the word corrugated is used in the claims in its broadest sense and is intended to cover any form of lateral bends. 1

Although certain specific embodiments of the invention have been illustrated and described it will be understood that the invention is capable of further modification and that further changes in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope of the invention as expressed in the following claims.

What I claim is:

1. A sheet metal expansion shield comprising a plurality of expansible sections having out-turned edges forming longitudinal ribs, the ribs formed by adjacent edges having transverse, interfitting corrugations.-

2. An expansion shield having walls of a single thickness and comprising a pair of expansible elements, each element having its longitudinal edges bent outwardly to form longitudinal ribs, the ribs being corrugated transversely, the corrugations on adjacent ribs being interfitting.

3'. An expansion shield having a tapered bore and having longitudinally extending transversely corrugated ribs on its outer surface, increasing in width as the bore de creases in section.

4. An expansion shield having a tapered bore and having longitudinally extending, abutting, transversely corrugated ribs on its outer surface, increasing in width as the bore decreases in section.

5. A sheet metal expansion shield comprising a: plurality of expansible members forming a tapered opening decreasing in size toward the inner end of the shield, each of said members having a longitudinal, outwardly extending, transversely corrugated rib of folded metal.

6. A sheet metal expansion shield comprising a tubular member having a tapered bore and longitudinally extending, transversely corrugated, folded, flanges increasing in height toward the smaller part of the tube.

7. An expansion shield comprising a tubular sheet metal member having a plurality of arms constructed toform a tapered bore,

. the adjacent edges of the arms being bent outwardly, transversely corrugated, and tapered oppositely to the taper of the bore.

8. A sheet metal -expansion shield comprising a plurality of expansible members forming a tapered opening decreasing in size toward the inner end of the shield, each of said members having a longitudinal, transversely corrugated rib of folded metal. In witness whereof, I have hereunto set my hand this th day of January, 1922.

' JOSEPH K. FISHER. 

